"""
Application orchestrator — pipeline mode entry point.
"""

import sys
import time

import effects_plugins
from engine import config
from engine.display import DisplayRegistry
from engine.effects import PerformanceMonitor, get_registry, set_monitor
from engine.fetch import fetch_all, fetch_poetry, load_cache
from engine.pipeline import (
    Pipeline,
    PipelineConfig,
    get_preset,
    list_presets,
)
from engine.pipeline.adapters import (
    SourceItemsToBufferStage,
    create_stage_from_display,
    create_stage_from_effect,
)


def main():
    """Main entry point - all modes now use presets."""
    if config.PIPELINE_DIAGRAM:
        try:
            from engine.pipeline import generate_pipeline_diagram
        except ImportError:
            print("Error: pipeline diagram not available")
            return
        print(generate_pipeline_diagram())
        return

    preset_name = None

    if config.PRESET:
        preset_name = config.PRESET
    elif config.PIPELINE_MODE:
        preset_name = config.PIPELINE_PRESET
    else:
        preset_name = "demo"

    available = list_presets()
    if preset_name not in available:
        print(f"Error: Unknown preset '{preset_name}'")
        print(f"Available presets: {', '.join(available)}")
        sys.exit(1)

    run_pipeline_mode(preset_name)


def run_pipeline_mode(preset_name: str = "demo"):
    """Run using the new unified pipeline architecture."""
    print("  \033[1;38;5;46mPIPELINE MODE\033[0m")
    print("  \033[38;5;245mUsing unified pipeline architecture\033[0m")

    effects_plugins.discover_plugins()

    monitor = PerformanceMonitor()
    set_monitor(monitor)

    preset = get_preset(preset_name)
    if not preset:
        print(f"  \033[38;5;196mUnknown preset: {preset_name}\033[0m")
        sys.exit(1)

    print(f"  \033[38;5;245mPreset: {preset.name} - {preset.description}\033[0m")

    params = preset.to_params()
    params.viewport_width = 80
    params.viewport_height = 24

    pipeline = Pipeline(
        config=PipelineConfig(
            source=preset.source,
            display=preset.display,
            camera=preset.camera,
            effects=preset.effects,
        )
    )

    print("  \033[38;5;245mFetching content...\033[0m")

    # Handle special sources that don't need traditional fetching
    introspection_source = None
    if preset.source == "pipeline-inspect":
        items = []
        print("  \033[38;5;245mUsing pipeline introspection source\033[0m")
    elif preset.source == "empty":
        items = []
        print("  \033[38;5;245mUsing empty source (no content)\033[0m")
    else:
        cached = load_cache()
        if cached:
            items = cached
        elif preset.source == "poetry":
            items, _, _ = fetch_poetry()
        else:
            items, _, _ = fetch_all()

        if not items:
            print("  \033[38;5;196mNo content available\033[0m")
            sys.exit(1)

        print(f"  \033[38;5;82mLoaded {len(items)} items\033[0m")

    # CLI --display flag takes priority over preset
    # Check if --display was explicitly provided
    display_name = preset.display
    if "--display" in sys.argv:
        idx = sys.argv.index("--display")
        if idx + 1 < len(sys.argv):
            display_name = sys.argv[idx + 1]

    display = DisplayRegistry.create(display_name)
    if not display:
        print(f"  \033[38;5;196mFailed to create display: {display_name}\033[0m")
        sys.exit(1)

    display.init(80, 24)

    effect_registry = get_registry()

    # Create source stage based on preset source type
    if preset.source == "pipeline-inspect":
        from engine.data_sources.pipeline_introspection import (
            PipelineIntrospectionSource,
        )
        from engine.pipeline.adapters import DataSourceStage

        introspection_source = PipelineIntrospectionSource(
            pipeline=None,  # Will be set after pipeline.build()
            viewport_width=80,
            viewport_height=24,
        )
        pipeline.add_stage(
            "source", DataSourceStage(introspection_source, name="pipeline-inspect")
        )
    elif preset.source == "empty":
        from engine.data_sources.sources import EmptyDataSource
        from engine.pipeline.adapters import DataSourceStage

        empty_source = EmptyDataSource(width=80, height=24)
        pipeline.add_stage("source", DataSourceStage(empty_source, name="empty"))
    else:
        from engine.data_sources.sources import ListDataSource
        from engine.pipeline.adapters import DataSourceStage

        list_source = ListDataSource(items, name=preset.source)
        pipeline.add_stage("source", DataSourceStage(list_source, name=preset.source))

    # Add FontStage for headlines/poetry (default for demo)
    if preset.source in ["headlines", "poetry"]:
        from engine.pipeline.adapters import FontStage, ViewportFilterStage

        # Add viewport filter to prevent rendering all items
        pipeline.add_stage(
            "viewport_filter", ViewportFilterStage(name="viewport-filter")
        )
        pipeline.add_stage("font", FontStage(name="font"))
    else:
        # Fallback to simple conversion for other sources
        pipeline.add_stage("render", SourceItemsToBufferStage(name="items-to-buffer"))

    # Add camera stage if specified in preset
    if preset.camera:
        from engine.camera import Camera
        from engine.pipeline.adapters import CameraStage

        camera = None
        if preset.camera == "vertical":
            camera = Camera.vertical()
        elif preset.camera == "horizontal":
            camera = Camera.horizontal()
        elif preset.camera == "omni":
            camera = Camera.omni()
        elif preset.camera == "floating":
            camera = Camera.floating()
        elif preset.camera == "bounce":
            camera = Camera.bounce()

        if camera:
            pipeline.add_stage("camera", CameraStage(camera, name=preset.camera))

    for effect_name in preset.effects:
        effect = effect_registry.get(effect_name)
        if effect:
            pipeline.add_stage(
                f"effect_{effect_name}", create_stage_from_effect(effect, effect_name)
            )

    pipeline.add_stage("display", create_stage_from_display(display, display_name))

    pipeline.build()

    # For pipeline-inspect, set the pipeline after build to avoid circular dependency
    if introspection_source is not None:
        introspection_source.set_pipeline(pipeline)

    if not pipeline.initialize():
        print("  \033[38;5;196mFailed to initialize pipeline\033[0m")
        sys.exit(1)

    print("  \033[38;5;82mStarting pipeline...\033[0m")
    print("  \033[38;5;245mPress Ctrl+C to exit\033[0m\n")

    ctx = pipeline.context
    ctx.params = params
    ctx.set("display", display)
    ctx.set("items", items)
    ctx.set("pipeline", pipeline)
    ctx.set("pipeline_order", pipeline.execution_order)

    current_width = 80
    current_height = 24

    if hasattr(display, "get_dimensions"):
        current_width, current_height = display.get_dimensions()
        params.viewport_width = current_width
        params.viewport_height = current_height

    try:
        frame = 0
        while True:
            params.frame_number = frame
            ctx.params = params

            result = pipeline.execute(items)
            if result.success:
                display.show(result.data, border=params.border)

            if hasattr(display, "is_quit_requested") and display.is_quit_requested():
                if hasattr(display, "clear_quit_request"):
                    display.clear_quit_request()
                raise KeyboardInterrupt()

            if hasattr(display, "get_dimensions"):
                new_w, new_h = display.get_dimensions()
                if new_w != current_width or new_h != current_height:
                    current_width, current_height = new_w, new_h
                    params.viewport_width = current_width
                    params.viewport_height = current_height

            time.sleep(1 / 60)
            frame += 1

    except KeyboardInterrupt:
        pipeline.cleanup()
        display.cleanup()
        print("\n  \033[38;5;245mPipeline stopped\033[0m")
        return

    pipeline.cleanup()
    display.cleanup()
    print("\n  \033[38;5;245mPipeline stopped\033[0m")


if __name__ == "__main__":
    main()